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Computer powering off

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Hey guys! :)

 

I'm posting here to get some ideas on how I should go about troubleshooting my desktop issue...

 

CPU - Intel Core i7-4790 3.6GHz Quad-Core Processor
CPU Cooler - Corsair H80i 77.0 CFM Liquid CPU Cooler
Motherboard - ASRock Z97 PRO4 ATX LGA1150 Motherboard
Storage 1 - TOSHIBA 1TB 3.5 INCH HDD (Buffer Size 32MB)
Storage 2 - Samsung 840 EVO 500GB
GPU - ZOTAC NVIDIA GeForce GTX 970
Memory 1 & 3 - ADATA 16GB (2 x 8GB) DDR3-1600 Memory
Memory 2 & 4 - Crucial 16GB (2 x 8GB) DDR3-1600 Memory
PSU - Super Flower 600W 80Plus

Case - NZXT H440 Black+Red

 

Basically, this is a custom built PC purchased from a local company (similar to Origin PC) at least a year and a half ago as I am not confident in building my own computer.

 

The issue I am currently facing is that the desktop powers off randomly when surfing the web, playing games or even watching videos on VLC. Sometimes, the desktop manages to pull through an entire week with no issues, and on random days, it power downs abruptly. Power seems to be cut off to the system -- viewing the Event Viewer shows a critical "Kernel-Power" log. Once the system shuts down, it tries to reboot itself.

 

What happens is as follows:

  1. the power LED illuminates;
  2. the fans kick in, only to die a second later;
  3. repeat process until power is switched off manually via the power socket;
  4. wait a minute or two, switch the system back on, the system will then manage to boot up successfully;
    • (if you immediately turn the system back on without waiting, it goes into the loop again);

This can happen in the middle of watching videos or playing games, the screen just freezes with sound looping through the speakers. The system is unresponsive and I'll have to hold the power button to do a force shutdown. The system then goes into the aforementioned 1-4 loop.

 

I've run Memtests and sent the desktop for troubleshooting (GPU stress tests, CPU stress tests), both attempts resulted in an "all clear". I'm really confused on what to do here, I've received advice from Reddit to purchase a new PSU as my PSU may be faulty but I don't really want to waste money on a new PSU if it isn't broken... could there be other factors that would be causing this issue, or should I just go ahead and purchase a new PSU?

 

If it helps, this is what happens on my tower: 

 

I look forward to hearing your advice!

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are you monitoring CPU temp during these tests?
most CPU's don't like 60C+ (laptops excluded)

 

if you can, see if you can barrow a PSU from a friend or ask a local computer store if they can loan you one. 

We can't Benchmark like we used to, but we have our ways. One trick is to shove more GPUs in your computer. Like the time I needed to NV-Link, because I needed a higher HeavenBench score, so I did an SLI, which is what they called NV-Link back in the day. So, I decided to put two GPUs in my computer, which was the style at the time. Now, to add another GPU to your computer, costs a new PSU. Now in those days PSUs said OCZ on them, "Gimme 750W OCZs for an SLI" you'd say. Now where were we? Oh yeah, the important thing was that I had two GPUs in my rig, which was the style at the time! They didn't have RGB PSUs at the time, because of the war. The only thing you could get was those big green ones. 

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56 minutes ago, VioDuskar said:

are you monitoring CPU temp during these tests?
most CPU's don't like 60C+ (laptops excluded)

 

if you can, see if you can barrow a PSU from a friend or ask a local computer store if they can loan you one. 

On Speccy, I can see that my CPU can range from 60C to 70C. Does this mean a faulty cooler? The lowest it drops to is 55C.

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that's pretty damn warm. you should probably take off your CPU heatsink/fan and make sure the fans are working properly. then clean off the CPU and heatsink block and reapply new thermal paste. 

 

with new thermal paste and a working fan you shouldn't get that hot.

We can't Benchmark like we used to, but we have our ways. One trick is to shove more GPUs in your computer. Like the time I needed to NV-Link, because I needed a higher HeavenBench score, so I did an SLI, which is what they called NV-Link back in the day. So, I decided to put two GPUs in my computer, which was the style at the time. Now, to add another GPU to your computer, costs a new PSU. Now in those days PSUs said OCZ on them, "Gimme 750W OCZs for an SLI" you'd say. Now where were we? Oh yeah, the important thing was that I had two GPUs in my rig, which was the style at the time! They didn't have RGB PSUs at the time, because of the war. The only thing you could get was those big green ones. 

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